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通过对比中温含铜取向硅钢与普通取向硅钢和高磁感取向硅钢的组织和织构特征,分析中温含铜取向硅钢独特的织构演变规律及其对二次再结晶行为的影响.结果表明,为了获得有利于高斯晶粒长大的强γ取向线织构,中温含铜钢需经过回复退火处理和高温退火阶段慢速升温.回复过程中γ取向线晶粒储能降低,同时慢速升温有利于γ取向线晶粒的形核和再结晶.中温含铜钢的二次再结晶开始温度超过1000℃,由于初次再结晶晶粒组织以γ织构为主且非γ取向线晶粒较少,导致最终二次晶粒尺寸超大且晶界圆滑,二次再结晶机理以择优长大为主导,超大的二次晶粒尺寸导致最终成品的铁损升高,但通过激光刻痕处理后,整体铁损的降低效果比二次晶粒较小的高磁感取向硅钢更加显著.
By comparing the microstructure and textural characteristics of medium-temperature copper-containing oriented silicon steel with those of normal-oriented silicon steel and high-magnetic-orientation oriented silicon steel, we analyzed the unique texture evolution and its effect on the secondary recrystallization behavior of medium temperature copper- In order to obtain a strong γ-oriented texture which is good for the growth of Gaussian grains, the temperature-controlled copper-containing steel needs to be slowly annealed and annealed at high temperature, and the energy storage of γ-oriented grain decreases during recovery, Which is in favor of the nucleation and recrystallization of γ-oriented grain.The secondary recrystallization temperature of copper-containing medium temperature steel is over 1000 ℃, the primary recrystallized grain structure is dominated by γ textures and the non-γ-oriented grain is more Resulting in a large secondary grain size and a smooth grain boundary. The secondary recrystallization mechanism is dominated by superiority and growth. Large secondary grain size leads to increased iron loss in the final product. However, after the laser scoring treatment , The overall iron loss reduction effect is smaller than the secondary grain high magnetic induction oriented silicon steel is more significant.